document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1063138>Question 1063138</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Prove that Tan^ 2 theta / ( Sec theta -1 )^2 = 1+ cos theta/ 1- cos theta </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #678202 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=678202\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Prove that Tan^ 2 theta / ( Sec theta -1 )^2 = 1+ cos theta/ 1- cos theta<BR>\n" );
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document.write( "tan^2/(sec^2 - 2sec + 1) =? (1 + cos)/(1 - cos)<BR>\n" );
document.write( "tan^2 =? (sec^2 - 2sec + 1)*(1 + cos)/(1 - cos)<BR>\n" );
document.write( "Multiply by cos^2<BR>\n" );
document.write( "sin^2 =? (1 - 2cos + cos^2)*(1 + cos)/(1 - cos)<BR>\n" );
document.write( "sin^2 =? (1 - cos)^2*(1 + cos)/(1 - cos)<BR>\n" );
document.write( "1 - cos^2 =? (1 - cos)^2*(1 + cos)/(1 - cos)<BR>\n" );
document.write( "1 =? (1 + cos)/(1 - cos)<BR>\n" );
document.write( "1 - cos <> 1 + cos<BR>\n" );
document.write( "It doesn't.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );